Floating-Point Formats : A list of the ranges and
precisions of various floating-point implementations over the years.

Functional Computation : A set of
recursive definitions starting with a minimal set of LISP-like functions,
and specifically related to work of Turing and Gödel.

My High-Performance Projects : Just a brief summary of all
the CPU-intensive projects I've created over the years, from
Z80 assembly-language to the present.

Hypercalc : The calculator that doesn't overflow.
Available as a JavaScript web application
courtesy of Kenny TM~ Chan, and in a standalone Perl version that
supports 295-digit precision and is programmable in BASIC.

LogCPU : a simple, very efficient load monitor for MacOS X.
(This is in the general CS category because it is a good example of
elegant display and UI)